disable gl.getError check for production

[chiefcll]

performing this check has a lot of overhead for each image.

[wouterlucas]

You can do this higher up the chain in checkGLError - that way you skip a few invocations
I don't know how important it is to have this on createShader

[chiefcll]

I think it's important in Dev to know if it worked. But in prod - won't matter. I'll look into moving it up...

[chiefcll]

done